A set hoop carries light along its whole edge, so it reads at a distance and moves when you do. A stud is a single point of light that reads at conversation range and nowhere else. That makes this a question about the room rather than about the earring: for a party, a hoop is doing a job a stud cannot do, and for a desk, a stud is doing a job a hoop makes tiring. The other half of it is hair — a hoop disappears under hair that is down, and a stud does not care.
Plated is plated, on both of these
Neither of these is solid metal: one is rhodium over crystal and the other a gold-tone setting, and plating wears wherever the piece is handled — the hinge on a hoop, the post on a stud. That is not a fault at this level, it is what the level is, and it is worth knowing so the wear is expected rather than disappointing. Take them off before a shower and they last considerably longer.
If you only buy one, the stud is the one that gets worn
This is not a recommendation so much as an observation about how earrings actually get used. The pair that lives in your ears is the pair you never have to decide about, and that is almost always the small one. A hoop is bought for occasions and gets worn on occasions, which is fine — as long as you are buying it knowing that, rather than expecting it to become the everyday pair.